Spherical heat sink



FIG. 1 is a top-front perspective view of the spherical heat sink;

FIG. 2 is a top view of the invention as shown in FIG. 1;

FIG. 3 is a side view of the invention as shown in FIG. 1 with theopposite sides being identical; and,

FIG. 4 is a bottom view of the invention with respect to FIG. 1.

The ornamental design for a spherical heat sink, as shown and described.